Tricky-Ricky Posted December 2, 2006 Share Posted December 2, 2006 Done a search but can't seem to find any reference, i have decided to change my suspension, its aftermarket but std ish, and a bit uncontrolled and occasionally crashy, not sure which way to go, i would like the adjustably of coil overs, but from past experience i have found most to be either suppled with to firm springs or the valving set to high, or both, so the result is far to hard! don't know what the std spring rate is so if someone could tell me this in KG/cm it would help me to find a reasonable combination, K sport do a reasonable priced set up but the spring rate is 17.8 kg front and 8.7 kg rear, so how does this compare with std? Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 3, 2006 Author Share Posted December 3, 2006 Anyone:search: Quote Link to comment Share on other sites More sharing options...
Chiefgroover Posted December 3, 2006 Share Posted December 3, 2006 std Uk AFAIK was 380lbs front and 220lbs rear. Search for an on line convertor. 17.8KG sounds like mahogany blocks to me! Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 4, 2006 Author Share Posted December 4, 2006 Well 15 kg is 839lbs:blink: so as you say 17kg is errr bloody hard!! so does anyone know what the std rate is? Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 4, 2006 Share Posted December 4, 2006 UK/US are 430lb F & 219lb R AFAI remember. Can't remember JDM rates. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 4, 2006 Share Posted December 4, 2006 Sorry in KG thats 7.69 Front & 3.92 Rear Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 4, 2006 Author Share Posted December 4, 2006 Thanks for that:) at least i have a starting point, i would think the J spec springs are slightly stiffer. Quote Link to comment Share on other sites More sharing options...
Guest Terry S Posted December 4, 2006 Share Posted December 4, 2006 J specs are definitely stiffer. The front spring rate you stated is very high, higher than I would want in a road car. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 4, 2006 Share Posted December 4, 2006 That front spring rate is plain silly in a road car, it will be aweful to drive and long term will be damaging the suspension and bodyshell. You'll transform things if you go close to stock rates on the springs and close to stock ride height. Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted December 4, 2006 Author Share Posted December 4, 2006 Thanks Chris, so what your saying is keep the spring rates not much stiffer than stock, and not to low, which is kind of what i have in mind, but i would like the hight/damping and preloaded adjustably of the coilover design, and i quite like the idea of the being able to run the Tein EDFC, but most of the the range of Tein and other coilovers seem to have to high spring rates and damping:( Quote Link to comment Share on other sites More sharing options...
swandip Posted December 4, 2006 Share Posted December 4, 2006 Ive just had delivered RS-R springs delivered to go on my J Spec TT, What kind of ride can I expect from these as they are going onto yellow Bilstiens and should lower the front by 35mm and rear 25mm. Or do you have the spring rate for the RS-R. Cheers Quote Link to comment Share on other sites More sharing options...
Chiefgroover Posted December 4, 2006 Share Posted December 4, 2006 Thanks Chris, so what your saying is keep the spring rates not much stiffer than stock, and not to low, which is kind of what i have in mind, but i would like the hight/damping and preloaded adjustably of the coilover design, and i quite like the idea of the being able to run the Tein EDFC, but most of the the range of Tein and other coilovers seem to have to high spring rates and damping:( IMO you'll find that after a while, you will have one setting and stick to it. Changing damper rates aint that smart when the srping rates stay the same. I learnt this after a much testing. If your springs are too hard to start with then you can adjust all you want but never have it right. Chris does a setup thats spot on for UK crappy roads, and you get the poper geometry setup before you leave, which is worth more than you can imagine especially on 18" wheels. Ask anyone who has it, he has 100% satisfaction rate. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 4, 2006 Share Posted December 4, 2006 Ive just had delivered RS-R springs delivered to go on my J Spec TT, What kind of ride can I expect from these as they are going onto yellow Bilstiens and should lower the front by 35mm and rear 25mm. Or do you have the spring rate for the RS-R. Cheers Far too low, the kinematics will be way out, with little suspension travel level before the bump rubbers. Quote Link to comment Share on other sites More sharing options...
Lucifer Posted December 4, 2006 Share Posted December 4, 2006 Far too low, the kinematics will be way out, with little suspension travel level before the bump rubbers. Agreed, the best match I have found off teh shelf is the HIgher Eibach version. Chris whats your thought s on those? -15mmF -10mm R Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted December 4, 2006 Share Posted December 4, 2006 Agreed, the best match I have found off teh shelf is the HIgher Eibach version. Chris whats your thought s on those? -15mmF -10mm R Seem like sensible rates, but for a best of both worlds set up you need none linear springs, which are expensive, but are very effective! can you e-mail me your bank details please Martin, I can't seem to find them, cheers. Quote Link to comment Share on other sites More sharing options...
Chiefgroover Posted December 4, 2006 Share Posted December 4, 2006 The drawback of eibachs and std struts is that after a few weeks the ride becomes very harsh as it feels like the struts have pumped themselves up. I actually managed a smoother ride with HKS hypermax2 turned up about half way, and thats not soft. Most kits are developed for countrys with nicely surfaced roads, e.g anywhere but here, so loosing the odd filling can become a reality if the setup is unsuitable. I dont believe there is a "bolt on" off the shelf kit on the market that will show you cars true handling potential. I'd rather have a very good geometry reset than bad geometry and fancy struts again. Been there and was glad to move on. The side effect of a quick lowering job is too much negative camber which breaks away rather suddenly in the wet. Whatever you decide, i hope you get to see the true handling potential of your Supra. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.